Health risk assessment and soil and plant heavy metal and bromine contents in field plots after ten years of organic and mineral fertilization.

Heavy metals and bromine (Br) derived from organic and industrialized fertilizers can be absorbed, transported and accumulated into parts of plants ingested by humans. This study aimed to evaluate in an experiment conducted under no-tillage for 10 years, totaling 14 applications of pig slurry manure (PS), pig deep-litter (PL), dairy slurry (DS) and mineral fertilizer (MF), the heavy metal and Br contents in soil and in whether the grains produced by corn (Zea mays L.) and wheat (Triticum aestivum L.) under these conditions could result in risk to human health. The total contents of As, Cd, Pb, Cr, Ni, Cu, Zn and Br were analyzed in samples of fertilizers, waste, soil, shoots and grains of corn and wheat. Afterwards, enrichment factor (EF), accumulation factor (AF), health risk index (HRI), target hazard quotient (THQ) and target cancer risk (TCR) were determined. Mineral fertilizer exhibited the highest As and Cr content, while the highest levels of Cu and Zn were found in animal waste. The contents of As, Cd, Cr, Cu, Ni, Pb and Zn in soil were below the limits established by environmental regulatory agencies. However, a significant enrichment factor was found for Cu in soil with a history of PL application. Furthermore, high Zn contents were found in shoots and grains of corn and wheat, especially when the plants were grown in soil with organic waste application. Applications of organic waste and mineral fertilizer provided high HRI and THQ for Br and Zn, posing risks to human health. The intake of corn and wheat fertilized with pig slurry manure, swine deep bed, liquid cattle manure and industrialized mineral fertilizer did not present TCR.

Growth, biochemical response and nutritional status of Angico-Vermelho (Parapiptadenia rigida (Bentham) Brenan) under the application of soil amendment in Cu-contaminated soil.

Forest species Angico-Vermelho (Parapiptadenia rigida (Bentham) Brenan) is an alternative for the revegetation of areas contaminated with high levels of heavy metals such as copper (Cu). However, excess Cu may cause toxicity to plants, which is why the use of soil amendments can facilitate cultivation by reducing the availability of Cu in the soil. The aim of this study was to assess how the use of amendment can contribute to growth and nutritional status as well as reduce oxidative stress in Angico-Vermelho grown in Cu-contaminated soil. Samples of a Typic Hapludalf soil containing high Cu content were used for the application of four amendments (limestone, organic compost, Ca silicate and zeolite), in addition to a control treatment. The treatments were arranged in a completely randomized design, with four replicates. The use of amendments decreased Cu content available in soil and contributed to improve both plant nutritional status and its antioxidant response expressed by enzymatic activity. The application of the amendments, especially zeolite and Ca silicate, increased dry matter yield of Angico-Vermelho. Thus, the results presented here suggest that the use of amendments contributes to improving Cu-contaminated soils and favors revegetation with Angico-Vermelho.

Grape yield and must composition of Cabernet Sauvignon grapevines with organic compost and urea fertilization / Produtividade de uvas e composição do mosto de videiras ‘Cabernet Sauvignon fertilizadas comcomposto orgânico e ureia

Urea and organic compost are applied as a nitrogen (N) source in vineyards. The aim of this study was to evaluate the yield, total N content in the leaves and the must composition in grapevines with the application of organic compost and urea. Cabernet Sauvignon grapevines, in the 2008/2009 and 2009/2010 crop seasons were subjected to the application of 40 kg N ha-1 in the form of organic compost and urea; but there were also unfertilized grapevines. In both crop seasons, leaves were collected at the stages of full flowering and at the change in color of the berries, and the total N content was analyzed; grape yield was evaluated and enological attributes were determined in the must. The application of organic compost and urea did not affect the N content in the leaf nor the grape yield in the second crop season evaluated. However, in the first crop season, grape yield was greater in the grapevines with application of organic compost on the soil. The addition of N sources did not affect the total nutrient content in the must but, in the second crop season, the grape must from the grapevines with the addition of organic compost had a lower soluble solids concentration and a higher total acidity value, as well as tartaric and malic acid values.(AU)

A ureia e o composto orgânico são aplicados em vinhedos como fonte de nitrogênio (N). O estudo objetivou avaliar a produtividade, o teor de N total em folhas e a composição do mosto em videiras submetidas à aplicação de composto orgânico e ureia. Videiras ‘Cabernet Sauvignon nas safras de 2008/2009 e 2009/2010 foram submetidas à aplicação de 40 kg de N ha-1 na forma de composto orgânico e ureia, mas videiras também não foram adubadas. Nas duas safras foram coletadas folhas no florescimento e na mudança da cor das bagas, preparadas e submetidas à análise de N total. A produção de uva foi avaliada e atributos enológicos foram determinados no mosto. A aplicação de composto orgânico e ureia não afetou o teor de N total nas folhas e a produção de uva na segunda safra avaliada. Mas, na primeira safra, a produção de uva foi maior nas videiras submetidas à aplicação com composto orgânico no solo. A adição de fontes de N não afetou o conteúdo de nutrientes no mosto mas, na segunda safra, o mosto da uva derivado das plantas com a adição de composto orgânico apresentou baixo teor de sólidos solúveis totais, maior valor de acidez, ácido tartárico e ácido málico.(AU)

Grape yield and must composition of Cabernet Sauvignon grapevines with organic compost and urea fertilization / Produtividade de uvas e composição do mosto de videiras ‘Cabernet Sauvignon’ fertilizadas comcomposto orgânico e ureia

Urea and organic compost are applied as a nitrogen (N) source in vineyards. The aim of this study was to evaluate the yield, total N content in the leaves and the must composition in grapevines with the application of organic compost and urea. Cabernet Sauvignon grapevines, in the 2008/2009 and 2009/2010 crop seasons were subjected to the application of 40 kg N ha-1 in the form of organic compost and urea; but there were also unfertilized grapevines. In both crop seasons, leaves were collected at the stages of full flowering and at the change in color of the berries, and the total N content was analyzed; grape yield was evaluated and enological attributes were determined in the must. The application of organic compost and urea did not affect the N content in the leaf nor the grape yield in the second crop season evaluated. However, in the first crop season, grape yield was greater in the grapevines with application of organic compost on the soil. The addition of N sources did not affect the total nutrient content in the must but, in the second crop season, the grape must from the grapevines with the addition of organic compost had a lower soluble solids concentration and a higher total acidity value, as well as tartaric and malic acid values.

A ureia e o composto orgânico são aplicados em vinhedos como fonte de nitrogênio (N). O estudo objetivou avaliar a produtividade, o teor de N total em folhas e a composição do mosto em videiras submetidas à aplicação de composto orgânico e ureia. Videiras ‘Cabernet Sauvignon’ nas safras de 2008/2009 e 2009/2010 foram submetidas à aplicação de 40 kg de N ha-1 na forma de composto orgânico e ureia, mas videiras também não foram adubadas. Nas duas safras foram coletadas folhas no florescimento e na mudança da cor das bagas, preparadas e submetidas à análise de N total. A produção de uva foi avaliada e atributos enológicos foram determinados no mosto. A aplicação de composto orgânico e ureia não afetou o teor de N total nas folhas e a produção de uva na segunda safra avaliada. Mas, na primeira safra, a produção de uva foi maior nas videiras submetidas à aplicação com composto orgânico no solo. A adição de fontes de N não afetou o conteúdo de nutrientes no mosto mas, na segunda safra, o mosto da uva derivado das plantas com a adição de composto orgânico apresentou baixo teor de sólidos solúveis totais, maior valor de acidez, ácido tartárico e ácido málico.